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IS 320 (1980) : High Tensile Brass Rods and Sections (Other 
Than Forging Stock) [MTD 8: Copper and Copper Alloys] 




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PROTECTED BY COPYRIGHT 



IS: 320 -1980 

(Reaffirmed 2006) 



Indian Standard 



SPECIFICATION FOR 

HIGH TENSILE BRASS RODS AND SECTIONS 

(OTHER THAN FORGING STOCK) 

(Second Revision) 

Fifth Reprint JULY 2007 
(Including Amendment No. 1) 

UDC 669.35'5.01 8.295 — 422 



© Copyright 1980 

BUREAU OF INDIAN STANDARDS 

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG 
NEW DELHI 1 10002 

Gr2 November 1980 



AMENDMENT NO. 1 JUNE 2004 

TO 

IS 320 : 1980 SPECIFICATION FOR 

HIGH TENSILE BRASS RODS AND SECTIONS 

(OTHER THAN FORGING STOCK) 

( Second Revision ) 

( Page 3, clause 2.1, line 2 ) — Substitute 'IS 3288 ( Part 3 ) : I986t' for 
4 IS3288:(PartI)-1973t\ 

( Page 3, footnote marked 4 t') — Substitute the following for the existing 
footnote: 

^Glossary of terms relating to copper and copper alloys . Part 3 Wrought forms/ 

( Page 4, clause 3.1, line 2)- Substitute 4 1S 1387: 1993*'/^ 'IS : 1387 - 
1967*'. 

( Page 4, footnote marked '** ) — Substitute the following for the existing: 

4 *General requirements for the supply of metallurgical materials (second revision f . 

( Page 5, clause 6.1.1, line 1 ) —Substitute 4 IS 1608 : 1995* '/or *IS : 2654- 
1964*'. 

( Page 5, footnote marked '*' ) — Substitute the following for the existing 
footnote: 

'^Mechanical testing of metals — Tensile testing (second revision).' 

( Page 6, clause 6.2.1, line 2 ) —Substitute 'IS 2305 : 1988*'/or 'IS : 2305 - 
1962*'. 

( Page 6, footnote marked 4 *' ) — Substitute the following for the existing 
footnote: 

4 *Mcthod for mercurous nitrate test for copper and copper alloys (Jim revision). ' 

( Page 6, clause 8.1, line 2 ) — Substitute IS 2826 : 19861' ' for 'IS : 2826- 
19801-*. 

( Page 6, footnote marked 'V ) — Substitute the following for the existing 
footnote: 



Amend No. 1 to IS 320 : 1980 

'tDimensions and tolerances for copper and copper alloys, rods and bars for general engineering 
purposes (third revision ).' 

( Page 6, clause 8.2.1, line 1)— Substitute 'IS 2826 : 19861* 1 /<>' 4 IS : 2826- 
1980T. 

( Page 6, footnote marked 'f ) — Substitute the following for the existing 
footnote: 

^Dimensions and tolerances for copper and copper alloys, rods and bars for general engineering 
purposes (third revision).' 

( Page 6, clause 8.2.2, line 1 ) — Substitute 4 IS 2826 : I986f for 'IS 2826 : 
1980t\ 

( Page 6, footnote marked T ) - Substitute the following for the existing 
footnote: 

'tDimcnsions and tolerances for copper and copper alloys, rods and bars for general engineering 
purposes (third revision). ' 

( Page 7, clause 11.1, line3)— Substitute 'IS 1608:1995 * ' for 4 IS : 2654 - 
i964*' 

( Page 7, footnote marked **' ) — Substitute the following for the existing 
footnote: 

* *Mcchanical testing of metals — Tensile testing (second revision). * 
( MTD 8 ) 



IS t 320 - 1M0 

Indian Standard 

SPECIFICATION FOR 
HIGH TENSILE BRASS RODS AND SECTIONS 
( OTHER THAN FORGING STOCK ) 

(Second Revision) 



Copper and Copper Alloys Sectional Committee, SMDC 11 

Chairman Representing 

Dr L. R. Vaidyanath Indian Copper Information Centre, Calcutta 

Mtmbers 
Shri Dev Kumar Aooarwal Bralco Metal Industries Pvt Ltd, Bombay 

Shri V. R. Gadrk ( Alternate ) 
Shri S. N. Bafna Coventary Metals Rajasthan Pvt Ltd, Jodhpur 

Shri N. M. Bafna ( Alternate ) 
Shri J. Naorbh Bhatt Indian Telephone Industries Ltd, Bangalore 

Shri A. Dwarkanath ( Alternate ) 
Shri V. N. Bhidr Directorate General of Ordnance Factories 

( Ministry of Defence ), Calcutta 

Shri S. K. Mohanty ( Alternate) 
Shri S. N. Chanda Bengal Ingot Co Ltd, Calcutta 

Shri S K Das Directorate of Production & Inspection ( Naval ), 

Ministry of Defence ( DGI ) 

Shri S. C. Paul ( Alternate ) „«_,,* T ^ * 

Shri P. Ghosh Indian Cable Co, Jamshedpur 

Shri Trilok Sinoh ( Alternate ) ,*„... 

Shri A. K. Guha Directorate General of Supplies & Disposals, 

New Delhi 
Shri A. V. Harnr Bharat Heavy Electricals Ltd, Secunderabad 

Shri T. K. Mukhbrjkb ( Alternate I ) 

Shri K. N. WadhWa ( Alternatell ) 
Shri D. P. Jain Saru Smelting Pvt Ltd, Meerut 

Shri D. N. Chakrarorty ( Alternate ) 
Shri S. L. Jain Alcobex Metals (P) Ltd, Meerut 

Shri S. Ramaxrishnan ( Alternate ) 
Shri F. A. A. Jasdanwaixa Indian Standard Metal Co Ltd, Bombay 

Shri C. Chattirjfsic ( Alternate ) 

( Continued an page t ) 



O Copyright 1980 

BUREAU OF INDIAN STANDARDS 

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and 
reproduction in whole or in part by any means except with written permission of the 
publisher shall be deemed to be an infringement of copyright under the said Act. 



IS t 320 - 1980 

( Continu$d from page 1 ) 

Members Representing 

Shri S. K. Khandekar Vanaz Engineers (P) Ltd, Pune 

Shri A. S. Suryanaran ( Alternate ) 
Shri J. Marwaha Ministry of Steel & Mines, New Delhi; and 

Hindustan Copper Ltd, Ghatsila 
Db S. K. Biswas ( Alternate ) 
Shri Lax am an Mishra Directorate General of Technical Development, 

New Delhi 
Shri T. R. Mohan Rao ( Alternate ) 
Shri B. M. Mistry Ministry of Finance 

Shri A. K. Mitra National Pipes & Tubes Co Ltd, Calcutta 

Shri S. V. Nadxarni Advani Oerlikon Ltd, Bombay 

Shri S. K. Sbnoupta ( Alternate ) 
Shri A. T. Pal Ministry of Defence (R&D) 

Shri I. N. Bhatia ( Alternate ) 
Shri IT. S. PIrohi Kamani Metals and Alloys Ltd, Bombay 

Shri A. H. Sabhaohandani ( Alternate ) 
Dr E. G. Ramachandran Indian Institute of Technology, Madras 

Shri P. S. Ramaswamy Bhandary Metallurgical Corporation Pvt Ltd, 

Bombay 
Shri M. K. Rao Indian Non-ferrous Metals Manufacturers Associa- 

tion, Calcutta; and The Binani Metal Works Ltd, 
Calcutta 
Shri B. Naoohaudhuri ( Alternate) 
Representative Institution of Engineers ( India ), Calcutta; and 

Khetri Copper Complex, Jodhpur 
Shri S. K. Roy Ministry of Defencr ( DGI ) 

Shri P. K. L. P. Nimankar ( Alternate ) 
Shri D. K. Sehgal Leader Engineering Works, Jullundur 

Shri V. K. Choudhury ( Alternate ) 
Senior Chrmist & Metallur- Ministry of Railways 
oist, Central. Railway, 
Bombay 
Deputy Director ( Met )-II 
RDSO, Luoknow ( Alternate ) 
Shri S. C. Sivaram akrishnan National Metallurgical Laboratory ( CSIR ), 

Jam shed pur 
Shri N. S. Surana Multimetals Ltd, Kota 

Shri S. S. Vaidyanathan J. B. Metal Industries Pvt Ltd, Bombay 

Shri C. R. Rama Rao, Director General, ISI ( Ex-oficie Member ) 

Director ( Struc & Met ) 

Secretaries 

Shri S. L. Bali 
Deputy Director ( Met ), ISI 

Shri O. N. Daboupta 
Deputy Director ( Met ), ISI 



IS t 320 - 1980 

Indian Standard 

SPECIFICATION FOR 
HIGH TENSILE BRASS RODS AND SECTIONS 
( OTHER THAN FORGING STOCK ) 

{Second Revision) 

0. FOREWORD 

0.1 This Indian Standard (Second Revision) was adopted by the Indian 
Standards Institution on 25 August 1980, after the draft finalized by 
the Copper and Copper Alloys Sectional Committee had been approved 
by the Structural and Metals Division Council. 

0.2 This standard was first published in 1951 and revised in 1962. In 
this revision, only two grades have been specified namely HT 1 which 
replaces Allovs 1 and 2 and HT 2 which replaces Alloy 3. Mechanical 
properties of HT I and HT 2 have also been modified. HT I is suitable 
for soldering and HT 2 is suitable for machining. 

0-3 For the purpose of deciding whether a particular requirement of this 
standard is complied with, the final value, observed or calculated, 
expressing the result of a test or analysis, shall be rounded off in 
accordance with IS : 2-1960*. The number of significant places retained 
in the rounded off value should be the same as that of the specified value 
in this standard. 



1. SCOPE 

1.1 This standard covers the requirements for rods and sections of high 
tensile brasses. 

2. TERMINOLOGY 

2.1 For the purpose of this standard, the definitions as given in IS : 3288 
( Part I )-l973| shall apply. 

•Rules for rounding off numerical values ( wised ). 

tGlosSary of terms for copper and copper alloys: Part I Cast form and wrought 
form ( main types ) (first revision ). 



IS t 320 - 1980 

3. SUPPLY OF MATERIAL 

3.1 General requirements relating to the supply of material shall be as 
laid down in IS : 1387-1967*. 

4. CHEMICAL COMPOSITION 

4.1 The material, when analyzed in accordance with IS : 3685-1966f shall 
have the chemical composition as given in Table 1. 





TABLE 1 


CHEMICAL COMPOSITION 




CONSTITUENT 




Percent 






Grade HT 1 


Grade HT 2 


Copper plus incidental 
nickel 


560-600 


56*0-61 


Tin 




02-10 


\0Max 


Lead 




*0*20.1-5 


♦0-50-1-5 


Iron 




0-20-1-25 


0-20-1-5 


Manganese 




0-25-2-0 


0-50-2-0 


Aluminium 




0-20 Max 


0-3-2-0 


Antimony, Max 




t0 02 


t002 


Total other elements, 


, Max 


0-50 


0-50 


Zinc 




Remainder 


Remainder 



Note — The chemical analysis for total impurities is not required if the supplier 
undertakes and certifies that the material does not contain impurities in excess of the 
limits specified. 

♦If material is required with lower lead content than that specified, it may be 
ordered with a maximum lead content of either 0*1 percent (lead free grade) or 
0*5 percent. 

flf required. 

4.2 The supplier shall, when required, supply free of charge a copy of 
the manufacturer's works analysis of the material. 

5. CONDITION OF DELIVERY 

5.1 The rods and sections shall be delivered in the as-manufactured 
condition and finished by such cold-rolling, annealing or straightening as 
may be necessary to meet the properties as specified by the purchaser. 

•General requirements for the supply of metallurgical materials {first revision ). 
t Met hods of chemical analysis of brasses. 



IS t 320 - 1980 

6. PHYSICAL PROPERTIES 

6.1 Tensile Test 

6.1.1 The material, when tested in accordance with IS : 2654-1964* 
fhall have the tensile properties as given in Table 2. 



TABLE 2 TENSILE PROPERTIES 



Grape Condition 



(1) 



IIT 1 



HT 1 



HT2 



HT2 



Size 



Tensile *0*2 Percent 
Strknmth, Puoof Strkss, 



Mm 



(2) 


.(») 


(4) 




mm 


MPa 


M 


For all sizes 


430 


( As-manu- 
faciured ) 






Cold- 

worked and 
stress- 

relieved 


Over 10 up to 
and includ- 
ing 40 


480 




Over 40 


4G0 


M 


For all sizes 


460 


( As-manu- 
factured ) 






Cold- 
worked and 
stress- 
relieved 


Over 10 up to 
and includ- 
ing 40 


520 



Min 



(5) 
MPa 

240 



280 



Over 40 



500 



Elongation 

Percentage 

on 

5'65i/£~ 

Gauoe 
Length, Min 

(6) 



20 
12 

15 
20 

12 
15 



Note — 1 MPa — 0102 kgf/mm«. 
♦To be agreed between the purchaser and the supplier. 



6.1.2 The fractured test piece shall be free from pipe and other harmful 
defects. 

6.1.3 Should a tensile test piece break outside the middle third of its 
gauge length and the elongation percentage obtained be lower than the 
minimum specified, the test may be discarded and another test made. 

•Method for tensile testing of copper and copper alloys. 

5 



IS i 320 - 1980 

6*2 Mercurous Nitrate Test 

6.2.1 If required, the material may be subjected to the test as specified 
in IS : 2305-1962*. 

6.2.2 The rods and sections shall not show any sign of cracking when 
subjected to this test. 

7. FREEDOM FROM DEFECTS 

7.1 The material shall be clean, smooth, free from surface defects, 
reasonably straight and free from twist. 

8. SIZES AND TOLERANCES 

8.1 Sizes — The material shall be supplied in sizes selected from 
IS : 2826-1980t as required by the purchaser. 

8.2 Tolerances 

8.2.1 For rods, the tolerances shall be as given in IS : 2826-1980f. 

8.2.2 For rods other than those covered in IS : 2826-I980f and for 
sections, the tolerances shall be as agreed between the purchaser and 
the supplier, and shall be stated on the order. 

9. SAMPLING 

9.1 When tests are specifically called for by the purchaser, materia] ( of 
the same type, size and temper ) shall be grouped in batches as follows 
and one sample shall be selected from each batch or part thereof to 
provide the necessary test pieces: 



Specified Size ( Diameter or Width 
Across Flats ) of Materials 


Mass of 
Each Batch 


f 

Over 


i 
Up to and 
Including 




mm 


mm 


kg 


— 


12 


250 


12 


40 


500 


40 


80 


1000 


80 


— 


2 000 



* Method for mercurom nitrate test for copper and copper alloys. 
tDimensions for wrought copper and copper alloy rods and bars ( for general 
engineering purposes ) ( stcond rtvision ). 



IS t 320 • 1980 

10. RETEST 

10.1 Should any of the test pieces first selected fail in any of the prescribed 
tests, two further samples from the same batch shall be selected for 
testing, one of which shall be from the rod or section from which 
the original test sample was taken, unless the rod or section has been 
withdrawn by the supplier. 

10.1.1 Should the test pieces from both these additional samples pass, 
the batch represented by the test samples shall be deemed to comply with 
this standard. In case the test pieces from either of these additional 
samples fail, the batch represented by the test samples shall be deemed 
not to comply with this standard. 

11. PREPARATION OF TEST PIECES 

11.1 Test Pieces for Tensile Test — Tensile tests shall be made on 
test pieces machined to the largest dimensions practicable. The test 
shall be done in accordance with IS : 2654-1964*. 

11.2 Preparation of Test Pieces for Mercurous Nitrate Test — The 

test piece for mercurous nitrate test shall be of 150 mm length. 

12. PACKING 

12.1 The method of packing shall be as agreed to between the purchaser 
and the manufacturer. 

13. MARKING 

13.1 Suitable tag marked with grade, size, mass, name of the manufac- 
turer and other information required by the purchaser shall be attached 
to each bundle of the material. 

13.1.1 The product may also be marked with Standard Mark. 



13.1.2 The use of the Standard Mark is governed by the provisions of the 
Bureau of Indian Standards Act, 1986 and the Rules and Regulations made 
thereunder. The details of conditions under which the licence for the use of 
Standard Mark may be granted to manufactures or producers may be obtained 
from the Bureau of Indian Standards. 



•Method for tensile testing of copper and copper alloys. 

7 
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